Hands-On Server-Side Web Development with Swift

Updating an entry

The handler for updating an entry is the second handler belonging to the /journal/Int.parameter route group:

func editEntry(_ req: Request) throws -> Future<HTTPStatus> {     let index = try req.parameters.next(Int.self)    let newID = UUID().uuidString    return try req.content.decode(Entry.self).map(to: HTTPStatus.self) { entry in // [1]        let newEntry = Entry(id: newID,                             title: entry.title,                             content: entry.content)        guard let result = self.journal.update(index: index, entry: newEntry) else {            throw Abort(.badRequest)        }        print("Updated: \(result)")        return .ok    }}

The line at [1] shows that the JSON object is decoded and serialized into an Entry object, and then an array containing HTTPStatus is returned from the mapping of a result using ...